Abstract
Is conservative surgery (laparoscopic salpingotomy) cost-effective, using fertility as the endpoint compared with medical management (Methotrexate) in women with an early tubal pregnancy? Conservative surgery appeared slightly, but not statistically significantly, more effective than medical management but also more costly. Women with an early tubal pregnancy treated with medical therapy (Methotrexate) or conservative surgery (laparoscopic salpingotomy) have comparable future intrauterine pregnancy rates by natural conception. Also, cost-minimisation studies have shown that medical therapy was less expensive than conservative surgery, but there is no cost-effectiveness study comparing these two treatments with fertility as the endpoint. A multicentre randomised controlled trial-based (DEMETER study) cost-effectiveness analysis of conservative surgery compared with medical therapy in women with an early tubal pregnancy was performed. Included women had an ultrasound that confirmed an early tubal pregnancy. They were randomly allocated to conservative surgery or to medical therapy. The study clinical outcome was the intrauterine pregnancy rate. The payer's perspective was considered. Costs of conservative surgery and medical therapy were compared. The analysis was performed according to the intention-to-treat principle. Missing variables were imputed using the fully conditional method. To characterise uncertainty and to provide a summary of it, a non-parametric bootstrap resampling was executed and cost-effectiveness accessibility curves were constructed. At baseline, costs per woman in the conservative surgery group and in the medical therapy group were 2627€ and 2463€, respectively, with a statistically significant difference of +164€. Conservative surgery resulted in a marginally, but non-significant (P = 0.46), higher future intrauterine pregnancy rate compared to medical therapy (0.700 vs. 0.649); leading, after bootstrap, to an incremental cost-effectiveness ratio of 1299€ (95% CI = -29 252; +29 919). Acceptability curves showed that conservative surgery could be considered a cost-effective treatment at a threshold of 3201€ for one additional future intrauterine pregnancy. A limitation was that monetary valuation was carried out using 2016 euros while the DEMETER study took place from 2005 to 2009. Anyway, the results would not have been very different given the marginal changes in the health insurance reimbursement tariffs during this period. Conservative surgery can be considered a cost-effective treatment, if the additional cost of 3201€ per additional future intrauterine pregnancy is an acceptable financial effort for the payer. None. NCT 00137982.
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